body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
}

/* 按钮样式 */
button {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 16px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

button:hover {
    background-color: #0056b3;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.15);
}

button:active {
    background-color: #004494;
    transform: scale(0.98);
}

button:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.5);
}